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Commit c96f8385 authored by Torsten Duwe's avatar Torsten Duwe Committed by Michael Ellerman
Browse files

powerpc/ftrace: Use generic ftrace_modify_all_code() 



Convert powerpc's arch_ftrace_update_code() from its own version to use
the generic default functionality (without stop_machine -- our
instructions are properly aligned and the replacements atomic).

With this we gain error checking and the much-needed function_trace_op
handling.

Reviewed-by: default avatarBalbir Singh <bsingharora@gmail.com>
Reviewed-by: default avatarKamalesh Babulal <kamalesh@linux.vnet.ibm.com>
Signed-off-by: default avatarTorsten Duwe <duwe@suse.de>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
parent 336a7b5d

arch/powerpc/kernel/ftrace.c

+5 −12
Original line number Diff line number Diff line
@@ -449,20 +449,13 @@ void ftrace_replace_code(int enable) 
	}

}



/*

 * Use the default ftrace_modify_all_code, but without

 * stop_machine().

 */

void arch_ftrace_update_code(int command)

{

	if (command & FTRACE_UPDATE_CALLS)

		ftrace_replace_code(1);

	else if (command & FTRACE_DISABLE_CALLS)

		ftrace_replace_code(0);



	if (command & FTRACE_UPDATE_TRACE_FUNC)

		ftrace_update_ftrace_func(ftrace_trace_function);



	if (command & FTRACE_START_FUNC_RET)

		ftrace_enable_ftrace_graph_caller();

	else if (command & FTRACE_STOP_FUNC_RET)

		ftrace_disable_ftrace_graph_caller();

	ftrace_modify_all_code(command);

}



int __init ftrace_dyn_arch_init(void)